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This week in science: A new black hole star, exercises for dementia, and winter shrews

NPR | By Nathan Rott,
Regina G. Barber
Published August 21, 2026 at 5:19 PM CDT

NPR's science podcast Short Wave talks about a new type of black hole star, the types of exercise linked to lowered dementia risk, and the wintry adaptations of the long-clawed shrew.

Copyright 2026 NPR
Science & Health
Nathan Rott
Nathan (Nate) Rott is a correspondent on NPR’s Science Desk, where he reports on the natural world and humanity’s relationship to it.
See stories by Nathan Rott
Regina G. Barber
Regina G. Barber is a co-host of Short Wave.
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